Align hedge UI/fees: drop 未启动, premium coin/U, equity incl perp margin, OKX option fees.

Option net uses Min(0.03%×coin, 7%×premium) with bid/ask fills (no slip); live PnL colors fixed.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/sim/hooks.py

@@ -55,7 +55,11 @@ def apply_sim_hooks(app_module: Any) -> None:
 
     def get_available_trading_usdt():
         if is_sim_mode(app_module.get_db):
-            return float(broker().balances_header()["trading_usdt"])
+            w = broker().balances_header()
+            # 开仓可用=未占用保证金的 USDT(勿用全仓权益)
+            if w.get("trading_usdt_free") is not None:
+                return float(w.get("trading_usdt_free") or 0)
+            return float(w.get("trading_usdt") or 0)
         return _orig_avail()
 
     def get_live_position_contracts(exchange_symbol, direction):
@@ -215,6 +219,7 @@ def _patch_okx_options_lib(app_module: Any) -> None:
                 te = float(w.get("trading_eth") or 0)
                 fb = float(w.get("funding_btc") or 0)
                 tb = float(w.get("trading_btc") or 0)
+                tu_free = float(w.get("trading_usdt_free") if w.get("trading_usdt_free") is not None else tu)
                 return {
                     "scope": "main",
                     "funding_usdt": fu,
@@ -227,12 +232,13 @@ def _patch_okx_options_lib(app_module: Any) -> None:
                     "trading_btc": tb,
                     "funding_usdt_avail": fu,
                     "funding_usdc_avail": fc,
-                    "trading_usdt_avail": tu,
+                    "trading_usdt_avail": tu_free,
                     "trading_usdc_avail": tc,
                     "funding_eth_avail": fe,
                     "trading_eth_avail": te,
                     "funding_btc_avail": fb,
                     "trading_btc_avail": tb,
+                    "perp_margin_usdt": float(w.get("perp_margin_usdt") or 0),
                 }
         except Exception:
             pass